How to Read and Send Text Messages in VB6 using Nokia PC Suite

I am developing an invoice software in VB 6 and part of it's functionality
is to receive and send text messages via mobile phone connected as a modem
though Nokia PC suite. Now i want to know if there is a way of reading and
sending text messages from PC suite or if there is another way of achieving
this, please shed more light. I have tried several times to search Nokia PC
suite VB 6 API's that may be available to achieve this but i found no
answers.

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I found their PC Suite a PIA, and that was just for me connecting my phone (no messages).
Here are a couple of lateral thoughts -

You could send emails instead.
I use the free VBSendMail application (VB6 code can be downloaded)
If you go down that path, there will be a variety of other approaches proffered by our members (based on recent threads).

You could send SMSs instead.
If you are prepared to bear a small charge per message, you will pretty easily get directions from our members, as some have gone down that path.
The paid approach also has the benefit of the ability to send regardless of the carriers being used by the recipients.

There are a number of SMS Gateways out there that you can interface to relatively easily.

The email solution kind of works; here in the US I can take my cell number and go to another provider, or even transfer it to a land line, so there's no guarantee that any number will remain with any carrier. It may or may not be the same in other countries, but you never know. Depending upon the number of messages involved, you may have to run your own mail server, and it can be tricky keeping it off of spam blacklists.

Please give me more information on using SMS gateways, am pretty prepared
to pay if the charges are reasonable, besides the application will be used
on commercial basis so users will cover such costs. Also will need
information on how to send emails. I need both ways to give a wide choice to
the users of the application to choose using sms or email.

For email you would need an SMTP server to connect to and send messages from (most hosting companies will allow this if you are not sending spam), then you need to create the message in VB, connect to the server, and send the message.

There have been a number of threads on here about sending email in the past (one in the last few weeks), so searching the group should get you a solid answer for this.

If you wish, I will send an application that get a message and send by Nokia connect in a PC.
I make a simple page to test.. Can you see: http://sbsistemas.webcindario.com/
My cell phone get the message in a Mysql Table and send SMS.